What does the CHECK constraint in DB2 ensure?
- Ensures a column is not NULL
- Ensures referential integrity
- Ensures uniqueness
- Ensures data meets specified conditions
The CHECK constraint in DB2 ensures that data inserted or updated in a column meets specific conditions or criteria defined by the user. It allows users to define custom rules to restrict the values that can be entered into a column, ensuring data integrity and validity. Therefore, the correct option is to ensure that data meets specified conditions.
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